About Days Since Date

A fast, free set of date and time tools. No sign-up, no app, no clutter.

What is here

• Date countdowns for all 366 days of the year, with the weekday each falls on and any holiday attached to it.
• Time countdowns for every minute of the day, on both the 12-hour and 24-hour clock.
• A day counter for any date from 1990 onward, forwards or backwards.
• A free browser alarm with sleep-cycle bedtimes.
• A 12 to 24 hour converter including military time.

How the numbers are worked out

Day counts use whole calendar days in UTC, so a count changes at UTC midnight rather than yours. Leap years and unequal month lengths are handled exactly: the "exact breakdown" on each date page walks real calendar months rather than dividing by an average, which is why it can differ slightly from the rounded months figure alongside it.

Countdowns to a time of day use your own device clock, so they are correct wherever you are without any time zone setting. Where a page quotes weeks or months as a decimal, it uses 7 days, 30.44 days and 365.2425 days respectively.

Accuracy

These tools are built to be right, but they are for general use. Anything that genuinely matters, a legal deadline, a medication schedule, a flight, should be confirmed against an authoritative source. The terms of use set this out properly.

Who runs this

Days Since Date is operated by Photon Technology International LLC, 16192 Coastal Highway, Lewes, DE, United States.

Get in touch

Corrections and suggestions are welcome through the contact page, or by email to hello@dayssincedate.com.